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Key Facts: SSC JE Electrical Exam

200 Qs

Paper I CBE

SSC Exam Pattern

₹100

Exam Fee

General/OBC Candidates

0.25

Negative Mark

Per Incorrect Answer

Level 6

Entry Pay Scale

7th Pay Commission

120 Min

Time Limit

Paper I Duration

32 Years

Max Age (CPWD)

Age limit as of notification

The SSC JE (Electrical) Paper I exam contains 200 objective questions (100 Electrical Engineering, 50 Reasoning, 50 General Awareness) with a strict 2-hour duration. It includes a negative marking of 0.25 marks per wrong answer. Over 100,000 candidates sit for the exam annually, and only 5-8% qualify for the descriptive-style Computer-Based Paper II (300 marks).

Sample SSC JE Electrical Practice Questions

Try these sample questions to review concepts for the SSC JE Electrical exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A copper conductor of resistance R is stretched such that its length is doubled while its volume remains constant. What is the new resistance of the conductor?
A.R/4
B.R/2
C.2R
D.4R
Explanation: When a wire is stretched such that its length is doubled, its cross-sectional area is halved to keep the volume constant (V = L * A). Since resistance R is proportional to length and inversely proportional to area (R = ρ * L / A), doubling the length and halving the area increases the resistance by a factor of 2 / 0.5 = 4. Thus, the new resistance is 4R.
2Three capacitors of capacitances 3 μF, 6 μF, and 9 μF are connected in series across a 110 V DC source. Which capacitor will store the maximum energy?
A.3 μF capacitor
B.6 μF capacitor
C.9 μF capacitor
D.All will store equal energy
Explanation: For capacitors in series, the charge Q on each capacitor is the same. The energy stored in a capacitor is given by E = Q^2 / (2C). Since Q is constant, the stored energy E is inversely proportional to the capacitance C. Therefore, the smallest capacitor (3 μF) will store the maximum energy.
3Which of the following materials has a negative temperature coefficient of resistance?
A.Copper
B.Silicon
C.Aluminum
D.Tungsten
Explanation: Silicon is a semiconductor and possesses a negative temperature coefficient of resistance. As temperature increases, more covalent bonds break, releasing free charge carriers (electrons and holes), which decreases its resistivity. Metals like copper, aluminum, and tungsten have positive temperature coefficients.
4An electric iron rated at 220 V, 1000 W is operated for 2 hours daily. What is the electrical energy consumed by the iron in a 30-day month?
A.15 kWh
B.30 kWh
C.60 kWh
D.120 kWh
Explanation: Energy consumed = Power * Time. The power rating is 1000 W = 1 kW. Daily usage is 2 hours, so daily energy consumption = 1 kW * 2 hours = 2 kWh. Monthly energy consumption for 30 days = 2 kWh/day * 30 days = 60 kWh.
5What is the unit of specific resistance (resistivity)?
A.Ohm-meter
B.Ohm/meter
C.Siemens/meter
D.Ohm-meter^2
Explanation: Resistivity ρ is defined by the formula R = ρ * L / A. Rearranging gives ρ = R * A / L. The SI unit of resistance is Ohm (Ω), area is m^2, and length is m. Therefore, the unit of resistivity is Ω * m^2 / m = Ω·m (Ohm-meter).
6Two inductors of self-inductances 4 H and 9 H are coupled with a coefficient of coupling k = 0.5. What is the mutual inductance between them?
A.2 H
B.3 H
C.4.5 H
D.6 H
Explanation: Mutual inductance M is given by the formula M = k * sqrt(L1 * L2). Substituting the values, M = 0.5 * sqrt(4 * 9) = 0.5 * sqrt(36) = 0.5 * 6 = 3 H.
7Which parameter remains constant when a magnetic circuit is compared to an electric circuit as an analog?
A.Flux is analogous to current
B.Reluctance is analogous to resistance
C.Permeability is analogous to conductivity
D.There is no actual flow of flux in a magnetic circuit
Explanation: While magnetic circuits are analyzed using electrical analogies (Flux ≈ Current, MMF ≈ EMF, Reluctance ≈ Resistance), a critical physical difference is that electrical current represents a physical flow of charge carriers (electrons), whereas magnetic flux does not involve any movement or flow of particles; it is a state of polarization in the medium.
8A current of 5 A flows through a non-inductive resistance of 10 Ω. What is the heat energy dissipated in the resistor in 5 minutes?
A.250 J
B.1250 J
C.15000 J
D.75000 J
Explanation: Heat energy dissipated (Joule's Law) H = I^2 * R * t. Here, I = 5 A, R = 10 Ω, and time t = 5 minutes = 5 * 60 = 300 seconds. Substituting these values: H = (5)^2 * 10 * 300 = 25 * 10 * 300 = 75,000 J = 75 kJ.
9According to Kirchhoff's Current Law (KCL), the algebraic sum of currents meeting at any junction in an electrical circuit is equal to:
A.Zero
B.Infinity
C.The sum of voltages
D.The total resistance
Explanation: Kirchhoff's Current Law (KCL) states that the algebraic sum of currents entering and leaving a node (junction) is zero (∑I = 0). This is based on the law of conservation of charge, meaning charge cannot accumulate at a node.
10A network contains 4 independent nodes and 6 branches. How many independent mesh equations can be written for this network?
A.2
B.3
C.4
D.10
Explanation: The number of independent loop/mesh equations is given by the formula: M = B - N + 1, where B is the number of branches and N is the number of nodes. Substituting the values: M = 6 - 4 + 1 = 3.

About the SSC JE Electrical Exam

National-level competitive examination to recruit Junior Engineers (Electrical) for various departments under the Government of India. The selection process consists of two Computer-Based Tests (Paper I and Paper II).

Exam sponsor: Staff Selection Commission (SSC). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Questions

200 questions

Time Limit

2 hours

Passing Score

30% (Qualifying mark; cut-offs are higher)

Exam / Certification Fees

₹100

Exam sponsor website

Reported exam pass rate: 5-8%. of Paper I candidates qualify for Paper II This describes exam candidates, not OpenExamPrep users or results from using our resources. Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

50%

General Engineering (Electrical)

Covers basic electrical concepts, circuit laws, AC fundamentals, electrical machines, power systems, measurements, and basic electronics.

25%

General Intelligence & Reasoning

Evaluates verbal and non-verbal reasoning, including series, coding, analogies, blood relations, and spatial visualization.

25%

General Awareness

Tests knowledge of current events, history, culture, geography, economics, general polity, and scientific research.

Preparing for the SSC JE Electrical Exam

What You Need to Know

  • Passing score: 30% (Qualifying mark; cut-offs are higher)
  • Exam length: 200 questions
  • Time limit: 2 hours
  • Exam / certification fees: ₹100 Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

SSC JE Electrical: Suggested Study Strategy

1Prioritize Electrical Machines (transformers, induction motors, and DC machines) and Circuit Laws, as they make up the bulk of the engineering questions.
2Practice solving 50 Reasoning questions within a 35-minute limit to save valuable time for the quantitative engineering section.
3Don't ignore the General Awareness section; study static GK (especially Polity and Physics/Chemistry) and the last 6 months of current affairs.
4Take at least 10 full-length timed mock tests to get used to the fast pace (200 questions in 120 minutes).
5Maintain a formula sheet for quick revision of AC circuits, machine formulas, and measuring instrument extensions.

Frequently Asked Questions

What is the negative marking scheme in SSC JE Paper I?

Paper I has a negative marking of 0.25 marks for every incorrect answer. It is advisable to skip questions when unsure to protect your score, as random guessing can significantly lower your ranking.

Is a calculator allowed in SSC JE Paper I?

No. Calculators, slide rules, or digital devices are strictly prohibited in Paper I. The questions are designed to be solved through mental math or rough paper calculations. In contrast, scientific calculators are allowed in Paper II.

What are the eligibility criteria for the SSC JE Electrical exam?

Candidates must hold either a B.E./B.Tech degree or a 3-year Diploma in Electrical Engineering from a recognized university. For certain departments (like MES), Diploma holders must have 2 years of professional experience in planning, execution, or maintenance work.

What is the typical cut-off score for SSC JE Electrical Paper I?

Although the minimum qualifying marks are 30% for UR, 25% for OBC/EWS, and 20% for SC/ST/PwD, the actual merit cut-off for Electrical Engineering typically ranges between 115 and 130 out of 200 marks, depending on difficulty and vacancy count.

Which government departments recruit through the SSC JE Electrical exam?

Recruiting departments include the Central Public Works Department (CPWD), Military Engineer Services (MES), Farakka Barrage Project, Central Water Power Research Station, Director General Quality Assurance (Naval), and National Technical Research Organisation (NTRO).